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The simple answer is no, not all parallelograms have at least one right angle.

However, there are some that do. Rectangles and squares are 'special' parallelograms that all have at least one right angle.

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0Most do, but a square or rectangle is a special case and has all right angles.

Yes: PARALLELOGRAMS can be rectangles. The difference is that rectangles must have one right angle, so not all parallelograms are rectangles, but all rectangles are parallelograms, by defiinition. Parallegram doesn't define anything in the English vocabulary.

only right tringles or HL triangles have at least 1 right angle

No, because to have a rectangle, you need to have four right angles, and parallelograms dont have to have right angles. However, all rectangles are parallelograms.

No. Rectangles are parallelograms with all right angles, while parallelograms just have 2 sets of parallel lines.

Two pentagons and five parallelograms.The parallelograms will be rectangles if the shape is a right pentagonal prism.Two pentagons and five parallelograms.The parallelograms will be rectangles if the shape is a right pentagonal prism.Two pentagons and five parallelograms.The parallelograms will be rectangles if the shape is a right pentagonal prism.Two pentagons and five parallelograms.The parallelograms will be rectangles if the shape is a right pentagonal prism.

All "parallelograms" have opposite sides that are parallel. If all four sides have an equal length and the angles are not all right angles, it is a rhombus. If there is any right angle, then they are all right angles and the parallelogram is a square.(note : it is not possible for a quadrilateral to have four equal sides without being one of these parallelograms.)

All parallelograms are not rectangles. The angles of a parallelogram need not be right angles and so the figure need not be a rectangle.

No. There are quadrilaterals that have no right angles.no,what about a trapizoid or rhombus

A square has to have all 4 right angles, by definition

A rectangle - has four right-angles at the corners. A Parallelogram - has no right-angles, but has opposite angles equal. Technically - a rectangle is a parallelogram, but a parallelogram can never be a rectangle. Clarification - Actually, all rectangles are parallelograms, but not all parallelograms are rectangles. The definition of a parallelogram is that of a four-sided shape where the opposite sides are parallel. There is no angle-size limitation in the definition. Squares, rectangles and rhombuses are all parallelograms.

In a right prism, the lateral sides are perpendicular to the bases and so all of them are rectangular.In an oblique prism, the lateral sides are not perpendicular to the bases so that some of them (at least) are non-rectangular parallelograms.In a right prism, the lateral sides are perpendicular to the bases and so all of them are rectangular.In an oblique prism, the lateral sides are not perpendicular to the bases so that some of them (at least) are non-rectangular parallelograms.In a right prism, the lateral sides are perpendicular to the bases and so all of them are rectangular.In an oblique prism, the lateral sides are not perpendicular to the bases so that some of them (at least) are non-rectangular parallelograms.In a right prism, the lateral sides are perpendicular to the bases and so all of them are rectangular.In an oblique prism, the lateral sides are not perpendicular to the bases so that some of them (at least) are non-rectangular parallelograms.

No. All rectangles are parallelograms, specifically those with two pair of parallel sides and all right angles.

If one angle is right, then all angles are right. The diagonals of a parallelogram bisect each other. Opposite angles are congruent. Opposite sides are congruent. Consecutive angles are supplementary.

All squares are parallelograms, but all parallelograms are not squares.

By definition, all squares are parallelograms. Not all parallelograms, however, are squares. All rectangles and rhombuses are also parallelograms.

No trapezoids are parallelograms, and no parallelograms are trapezoids.

No trapezoids are parallelograms, and no parallelograms are trapezoids.

A square. All squares are parallelograms, but not all parallelograms are squares.

Generally, there are no right angles in a parallelogram, but rectangles and squares can be seen as special parallelograms, as they have all the qualities needed to be classed as parallelograms, and in addition, they have four right angles.

Yes. But not all parallelograms are squares.All squares are also rectangles (and all rectangles are parallelograms), but not all rectangles are squares."parallelogram" just means both pairs of sides are parallel (and rectangle just means all the angles are right). Yes, since they all have a pair of sides that are parallel, they are all parallelograms. Parallelograms are squares only if all four sides are of the same length and all interior angles are 90o.

any parallelogram that does not have right angles.

No but all parallelograms are trapezoids

No, but all parallelograms are trapezoids.

No. All rhombi (rhombuses) are parallelograms but all parallelograms are not rhombi.

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